The black and white melee throws the two heroes at each other like never before, mixing the frantic and madcap energy of the 2014 hit “LEGO Movie” with the dark undercurrents of Frank Miller’s “The Dark Knight Returns.” The choreography in this clip is so precise and action-packed that it’s almost hard to imagine any live action feature film topping it. Plus, the short features a twist ending unlike any you’d expect to see in a fan-film involving the popular children’s toy. It’s likely that this is also darker than anything we’ll see in the upcoming official “LEGO Batman: The Movie.”